Brake rigging



A. M. MIERS BRAKE RIGGING Oct. 14, 1952 3 Sheets-Sheet l Filed Nov. 24,1948 A. M. MIERS BRAKE RIGGING oct. 14, 1952 3 Sheets-Sheet 2 Filed Nov.24, -1948 Oct. 14, 1952 A, M, MlERS 2,613,766

BRAKE RIGGING 3 Sheets-Sheet 3 Filed Nov. 24, 1948 IN VEN TOR.

Patented Oct. 14, 1952 BRAKE RIGGING Archie Miers, Croton-on-Hudson, N.Y., as-

signor to Chrysler Corporation, Highland Park, Mich., a corporation ofDelaware Application November 24, 1948, Serial No. 61,805

(Cl. 18S-205) fv 11 Claims.

This invention relates to railway car trucks and has particularreference to a simplied and improved means for mounting the brakerigging on the truck unit in such a manner that wear of the riggingcomponents is materially reduced. This reduction in .wear of the riggingcomponents is accomplished by resiliently suspending the rigging fromthe truck frame members such that thev` road shock applied to the framemembers is effectively absorbed by the suspension without beingtransmitted to the rigging. While the resilient brake rigging suspensionabsorbs the road shock, during normal running with the brakes released,still, the arrangement is such that positive, unyielding supports areprovided for the brake beams during application of the brakes andtherefore the resilient suspension means is not required to take thebrake reaction` and thus improved braking results.

Railroad maintenance records show conclu sively that one of the mostfrequent causes of lay-up of railway cars for repairs is"wear and damagein the brake rigging. The fact that the brake beam hanger links areoften fixedly supported on unsprung frame members has been found to beone of the primary causes for the maintenance difficulties associatedwith the brake rigging.

It is a primaryl object of this invention to mount the brake rigging onthe truck frame members in such a manner that under normal runningcondition with the brakes released the brake beam hangers are suspendedfrom resilient means which effectively absorb the road shock transmittedthrough the frame members to the rigging, the suspension arrangementbeing such that on application of the brakes the brake beam hangers areautomatically anchored to unsprung frame members which provideunyielding, positive, supports to take the brake reaction.

It is an additional object of this invention to provide a brake beamsuspension that is simple, durable, e'icient, and economical tomanufacture, install and maintain,

The nature of this invention as Well as additional objects andadvantages thereof will b ecome fully apparent from a reading of thefollowing de-` scription and auconsideration of the related drawingswherein:

Fig. 1 is a half plan view of a railway truck embodying this invention;

Fig. 2 is a side elevation of the railway truck shown in Fig. l withportions of the truck frame broken away to clearly disclose theinvention;

Fig. 3 is a vertical sectional view taken along the lines 3-3 of Fig. 1;

Fig. 4 is a sectional elevation taken along the lines 4-4 of Fig. 1; f

beam hanger suspension shown in Figs. l to 4; and

Fig. 6 is an enlarged sectional elevation similar to Fig. 5 embodying amodied form of the invention.

The'railway car truck i9 comprises longitudinally extending,transversely` spaced, side frame members I6 mounted on a pair oflongitudinally spaced, transversely extending, axles |I. Each axle I Icarries a pair of wheels I2 which engage the conventional track railsI3.' The protruding ends of each axle |I `are journaled in wheel axlebearing assemblies I4 one of which is clearly shown in Fig. 2 and issubsequently described in detail. The bearing assemblies I4 are mountedin the inverted U-shaped journal openings I5 (see Fig. 2) in the ends ofthe side frame mem-bers I6. The mounting of the bearing assemblies I4 inthe side frame journal openings I5 is such as to provide an unsprung,"pedestalless type of connection wherein the axles and bearingassemblies are solidly connected tothe side frame members and precludedfrom vertical movement with respect to the side frame members. Any typerof solid bearing connection may be used between the wheel axles and theside frames without aiecting the functioning of the brake beamsuspension. The

wheel axle bearing assembly herein disclosed is similar to that shown inthe U. S. patent to Janeway andMiers, No. 2,335,120.

Each of ther side frames I6 has a depressed middle sectionr Ita,provided with longitudinallyA spaced seats I'I on which are mountednested coil springs I8 through which the' truck load is resilientlyapplied to the side frame members. The springs I8 in turn support theendk portions of the longitudinally extending beam members I9 which alsoform a part of the load supporting system. Beams |9 include the springseats 20 to receive the upper ends of the coil springs I8. Beams I9 arearranged so` as to support another load carrying structure, namely, thetransom frame 2|. This transom frame 2| comprises longitudinally spacedmembers 21 extending transversely of the truck, which members are joinedat their ends by connecting sections 28 which overlie the centralportions of the beams I9. The connecting sections 28 are formed `withspring y,receiving seats 29 which are vertically aligned with thecomplementary seats 32 on the beams I9.' These aligned spring seats havemounted therebe` tween the nested coil springs 33. The springs 33transmit the load of the transom frame 2| to the beams I9 and at thesame time cushion the supported truck load against impacts or shockstransmitted from the wheels to the beams I9.

Transom frame 2| pivotally supports the truck lbolster member 42 byvmeans of swing hanger assemblies 43 which assemblies permit limitedtransverse swinging movement of the truck ,bolster relative to thetransom frame.l Swing hanger assemblies 43' are pivotally connected tothe transom frame 2| by the swing hanger pins 44. Hanger assemblies 43support the plank member 45 which rockably supports the bolster 42 atits center portion, Adjacent each outer end of plank 45 there aremounted spring units 46 that resiliently limit the transverse rocking ofthe bolster 42 relative to the plank member 45.

Thrust links 48, having their inner ends secured to a bracket 49 carriedby the bolster i2 and their outer ends anchored to brackets b carried bythe transom frame 2 I, restrict longitudinal movev ment of the bolsterrelative to the transom frame. Universal joints connect the thrust links4.8 to their supporting brackets 49 and 5G. Each link 48 includes aresilient draft member Eil which permits the links 43 to take up thelongitudinal thrust between the bolster 42 and the transom frame 2 l.Shock absorber units 52 restrain relative transverse or lateral movementbetween the bolster and transom frame.

Relative movement members I6 and the beam-mernbers I 9 is controlled bythe shock absorber units 53 mounted therebetween. Alongthe outboard sideof each side frame I6 there ispositioned a longitudinally extendingstabilizing member 54, having one of its ends pivotally connected to thebracket 'I2 carried by the transom frame 2l and its other end pivotallyconnected to a bracket 55 carried by they side frame I S to restrainrelative longitudinal and transverse movement between the side framemembers and the transom frame.

The central portion of the truck bolster 4:2 is

formed with 'a conventional bearing member 4T which receives acomplementary bearing portion carried by the body unit to be mounted onthe truck unit. The bearing connections between the body unit and thetruck bolsters permit relative turning movement between the car bodyunit and the supporting truck units.

It is now thought to be obvious how the lo'a'd of the car body unit andits contents istransferred to the truck bolster 42 and then through theswing hanger assembliesll to the transom frame 2 I'. The transom frame2i Arests upon the springs Q3 which are in turn supported on the beamsI9. Beams I9 transmit the car load to the side frame members IS throughthe springs I8. The side frame members I6 are rigidly supported at each`end on the wheel axle bearing assemblies I4 which are mounted on theends of the axles Il.

The manner of solidly mounting the side frames IB on the axle supportedwheel bearing assemblies I4, isshown in Fig'. 2. Each side frame endportionis provided with a U-shaped journal opening I5 to receive a wheelaxle bearing assembly I4.

Each journal opening I 5 is formed with a bearing` seat 6I in the curvedbight portion of its U-shaped wall. The seat portion BI receives therigid bearing assembly I4 carried by the wheel axle II. Tie members 62extend across the open vmouth l of the U-shaped opening I5 to retain thebearing assembly I4 within the opening I5. Each journal bearing assemblyI4 comprises an outer housing 64 within which are concentrically mountedan outer roller bearing race 85, a set of tapered roller bearings 66,and an inner roller bearing race 6l, the latter being securedto androtatable with the wheel axle k-I I. Housing 6d is adapted to containoil or some other liquid lubricant so that the rollers 66 of the bearingassembly are constantly supplied with lubrioant. n l

- The wheel brake mechanism is best illustrated between the side framein Figs. l and 4 and comprises an air cylinder II 'I2 protruding fromthe transom frame connecting sections 23. Connected to one end of eachair cylinder il is a longitudinally extending brake shoe slack adjustingmechanism i3. Extending from the opposite end of each air cylinder 'IIis a piston actuated connecting rod I adapted to operate the brakelinkage associated therewith. Pivotally connected to the exposed end ofrod 14 is a horizontally disposed, transversely extending lever l5.Lever 'I5 is slidably supported adjacent its inner end by the bearingblock 'i6 carried by the transom frame member 2I. The inwardly disposedend of lever I is pivotally connected at TI to thelongitudinallyextending, vconnecting rod 18. Rod 'I8 is pivotallyconnected at 'i9 to the vertically disposed lever 82.v Lever 82 ispivotally connected intermediate itsvends, as at 83, to the inwardlydisposed end'of the longitudinally extending, lever member 84.' Lever 83is rigidly mounted on the resiliently supported, transends of the brakebeam 38 so as to permit rela-v tive rotatable movement of the shoes in avertical plane.

the spring-loaded bearing members I which tend to retain the shoes infixed positions relative toy the beam 98. Bearing members IGI] preventthe shoes from dragging on the wheels when the brakes are released whicheliminates wear and chatter. The lever 82 is' pivotally connected at 85to an intermediate portion of the compensating and actuating link 85.The outer end of link 86 is connected by the pivoted'link 87 to theouter end of the brake beam supported lever Bil. The connections betweenthe several levers'82 and 84 and links 85 and 81 permit relative pivotalmovement between these members and constitute a parallelogram linkage toprevent rotation of brake beam 98 in their hanger supports. A pluralityof pin holes are located along the length of link 855 to permitadjustment of thev brake linkage to compensate for wear of therigging'components. The inner end of actuating link 86 is pivotallyconnected at 88 to a vertically disposed lever 39 that is pivotallyconnected at 9D to the spring supported transom frame 2-I. Ahorizontally disposed, longitudinally extending, lever-like ment bythespring-loaded bearing members Si'.

similar to the bearing members 'lllil associated with the outer brakeshoes 99. The transom frame 2I with the depending levers 89 and 94 andthe brake beam lever SI constitute a parallelogram linkage to controlmovement of the inner brake shoe96. The actuating link 85 ties togetherthe'parallelogram linkages'for the inner and outer However, the freedomof Vrotation of the shoes 99 relative to thebeam 98 is restrained by'brake shoes so as to bring about substantially simultaneous applicationof both the inner and outer brake shoes when the brakes are to beapplied.

The brake rigging onall wheels of the truck is .identical and for thatreason the rigging on only one'wheelhas been described. The brakesuspension that has been described will beconsidered a front wheelsuspension for purposesof discussion. To coordinate the rigging on thefront and rear wheelsalong each side of the truck a horizontallydisposed, transversely extending rear wheel brake lever |04, similar indesign to lever associated with the front wheel brakes, is pivotallyconnected to anv adjustably mounted pivot pin |05 carriedvby the brakeshoe slack adjusting mechanism 15. The inwardly disposed end portion oflever |04I is pivotally connected to the connecting rod 18 for the brakelinkage associated with the rear wheel brakes. Lever |04 is slidablysupported on ar bearing block |06 carried by the transom frame member,the block |08 being similar to the bearing block 16 for the lever 15associated with the front wheel brakes. The intermediate portions oflevers 15 and |04 are connected together by a longitudinally extendingequalizing link |08 that coordinates the action of the front and rearwheel braking mechanisms.

It is thought .to be obvious how admission of air under pressure tocylinder 1|, so as to cause connecting rod 14 to move to the righttowards the front wheels of the truck, will apply the wheel brakes toboth the front and rear wheels of the truck.v Movement of rod 14forwardly rocks lever 15 about pivot pin connectionf|09 and this pullsrod 18 rearwardly. Moving rod 18 rearwardly rocks lever 82 rearwardlyabout pivot pin 85 and this pulls brake shoe 99 into engagement with theouter side'of the front wheel. Any further rearward movement of rod 18then rocks lever 82 about the anchored pivot pin 83 and this causespivot pin 85 and actuating link 86 to move forwardly to swing brake shoe96 into engagement with the inner side of the front wheel.r This seriesof movements takes lplace practically'instantaneously therefore 'boththe inner and outer brake shoes, 96 and 99 respectively, are actuated atpractically the same time. Due to the equalizing link |08, whichconnects the front and rear wheel brake linkages, the forward lmovementof lever 15 during application of the brakes vmoves the lever |04 of therear wheel brake rigging forwardly and this actuates the rear wheelbrake linkage in the same manner as described for the front wheel brakesconsequently both the front and rear wheel brakes are actuated at thesame time. The air supply for the air cylinders on each side of thetruck is such that the brakes on each side of the truck are Voperatedsimultaneously. f

As a result of the rigid mounting of the side frame members |6 on thewheel axles it is obvious that road shock will be transmitted lfrom thewheels |2 to the side frame I6 and lthence to the supports for the brakerigging `suspended from the unsprung side frames |6. Accordingly, if thebrake rigging is not resiliently supported from the side frames I6 insuch a manner `as to insulate the rigging from the shocks applied to theside frames, when the brakes are released, then the road shockytransmitted to the rigging supports will cause accelerated wear of thebearings and associated elements in the :rigging which can result inalfrequent shearingoi of .the brake beam. hanger pins, that is 'the pinsthat pivotally support the beam hangers |8. The wear results ing fromroad shock ina rigidly supported brake rigging construction therebymaterially reduces the'life of the side frame supported brake riggingand is a constant source .of possible trouble. Not only are the brakesrendered inoperative by such failures of the brake rigging componentsbut in addition the brake beam rigging may drop down on the rails andderail the truck units and their supported cars with a consequent lossof life'and property.

To eliminate this possible. source of trouble in the brake rigging, theside frame supported brake beams 98 are provided with resilientsuspensions that effectively absorb all shock impacts that might betransmitted to their rigging. The suspension arrangement is such that arigid support is automatically provided for this brake rigging when thebrakes are applied but at all other times this rigging is resilientlyinsulated from the supporting frame members. This resilient shockabsorbing suspension, comprises (see Fig. 5) a cantilever type leaflspring unit I2 rigidly mounted on the ends of the upper walls IBc ofeach of the side frames I6 by means `of U-bolts ||3. Spring units |I2are positioned such that the free ends of the cantilever spring armsoverlie the transversely extending end portions Ib of the side frameswhich in turn overlie the end portions of the outer brake beams 98.Fxedly mounted on the free end of each of the spring units |2 is adepending brake beam hanger support I4 that extends downwardly through avertically extending opening |20 in the end portion |617 of theassociated side frame. Each brake beam hanger support ||4 is formed withan upper, horizontally extending, washer-like, bearing portion I5, anintermediate, vertically extending, neck portion IIB, and a lower,U-shaped, yoke portion |1. Pivotally mounted in each U-shaped yokeportion ||1 by means of a hanger pin is a brake beam hanger IIB whichhas its lower end portion pivotally connected to an end portion of anouter brake beam 98.

The spring units ||2 areI of such a stiffness that they will deflectsuiiiciently to cushion the road shock transmitted to the frames |6 yetholdthe brake beam hanger supports |4 in suspended positions such thatthe hanger support bearing portions |15 and the yoke portions ||1 areout of contact with the adjacent portions |Bc of the side frame memberswhen the brakes are not being applied. rlhe length of the neck portions||6 of the supports ||4 is such that sufficient jounce space is providedbetween the portions ||5 and ||1 to absorb all shocks applied to theside frame members without the portions ||5 and ||1 contacting the upperor lower sides of the top walls |6c of the side frame members. By thisarrangement, under normal running conditions with the brake released,the brake beam hanger links ||4 are free of the side frame portions |6cand thus are not subjected to'wear resulting from road shock. When thebrakes are applied the brake reaction between the truck wheels and thebrake shoes is transmitted to the brake beam hanger supports ||4 andthese supports are forced either upwardly or downwardly, depending onthe direction of wheel rotation, until the yokes ||1 or the washer-likebearing portions ||5 bear against the upper walls |6c of the side framemembers so as to provide a firm, rigid support for the brake rigging.Fig. 4 shows the relative position of the swing hanger bearing portionsH5, the yoke portions ||1 and the top walls |60 of the side frameportions |6b whenk the brakes are applied during forward travel of thetruck. The other figures of the drawings show the position of the swinghanger links when the brakes are released.

In the modified form of the invention shown in Fig. 6, a coil spring |4|is mounted 'on the top wall ISC of the lside frame end portion IBb abovea vertically extending opening |42 piercing the end portion of sideframe member I6. Threaded through opening |42 and through the center ofcoil spring |4| is the vertically extending bolt portion |43 of brakebeam hanger support |44. Hanger support bolt portion |43 is suspendedfrom coil spring |4| by means of a washer cap |45 and a nut |46 mountedon the upper threaded end of bolt portion |43. The hanger support |44includes an integral, U-shaped, yoke portion |45 that is carried Vby thelower end of bolt portion |43. Yoke portion |45 is positioned beneaththe top wall |60 of the side frame member withthe sides of yoke portion|45 arranged between the vertically extending flange portions |6e of theside frame member i6. Flange portions |66 have verticallyr extendingslots if adapted to slidablyV receive a pivot pin |41 that pivotallyconnects the brake beam hanger |18 to the depending leg portions of theU-shaped hanger support yoke portion |45'. A Cotter pin |48 and washers|49 lock pin |41 in slots |6f. Pivot pin |41 cooperates with the slots16j in the side frame anges |66 to provide suitable guideways for themovable, resiliently suspended, hanger support |44. Hanger support yokeportion |45 has a at upper bearing surface |50 adapted to seat againstthe lower side of the side frame top wall lEc when the hanger support|44 is moved upwardly by brake reaction during application of thebrakes. Seating of the hanger pins |41 inthe lower ends of slots |Bflimits the downward movement of the hanger support |44 duringapplication of the brakes.

During normal running with the brakes released the hanger supports |44are resiliently suspended onthe springs |4| which absorb the road 'shockapplied to the side frames and prevent its transmission to the brakebeam hangers. When the brakes are applied the Fig. 6 arrangement`functions in the same manner as the construction shownin Fig. 5 for thehanger supports are moved against rigid frame anch-or members whichresist the brake reaction resulting from application of the brakes. TheFig. 6 form of the invention, in addition to resiliently supporting thebrake beam hangers, includes means that positively guides the movementof the resiliently mounted hanger supports. By providing thepin and slotguidev/ay construction shown in the Fig. 6 modification the' coil springsupports for the hanger members are not subjected to tilting or cantingduring brake applicationand this increases the life ofthe springs.

It will be noted that the brake rigging arrangements herein disclosedprovide resiliently mounted Vsuspensions for the brake beams duringnormal running with the brakes released. However, when the brakes areappliedthe resilient suspension for the brake beams is automaticallyconverted into a non-resilient, rigidly supported, brake riggingarrangement that provides a positive, improved braking action withoutunneces sarily stressing the resilient suspension. Thus not only has thelife of the-brake rigging been 8 improved by this construction but inaddition an improved braking action results.

Brake rigging supported entirelyon resilient suspensions soft enough tocushion road shock will not provide asufciently rigid support to takethe brake reactionxduring application of the brakes and thus such anarrangement can not provide a braking' action comparable to thatobtained with a solidly supported rigging. Brake rigging that ispermanently mounted on solid supports is subject to roadshock andconsequently unnecessary wear and a' short life. By the arrangements.herein disclosed the desirable features ofthe resiliently suspended andthe rigidly supported brake rigging systems have been combined into asingle brake rigging arrangement that'is free oftheV disadvantages ofeach of the aforementioned systems.

vI'claiin:

l.' Abrake beam suspension for a railway truck` frame member comprisinga vertically extending coilspring mounted on the frame member, avertically extending'opening piercing said frame member beneath the"opening through said coil spring, 'a brake beamhanger support suspendedfrom the coil spring and slidably mounted in the frame opening forvertical movement relative thereto in either of two opposite'directions,said hanger link including .an enlarged portion disposed beneath theopening through the frame member adapted to engage the frameV memberafter predetermined' movement of said hanger support in either of`saidopposite directions to limit the verticalv movement of said hangersupport andr to provide means for anchoring said support against saidframe member so as to provide a rigid reaction joint for braking action.

and a. brake beam hanger link pivotally connected to said hangersupport.

2'. A brake beam suspension for a railway truck frame member comprisinga vertically extending' coil spring mounted on the frame member, avertically extending opening piercing said frame member beneath'theopening through said coil spring,a brakeI beam hanger support vsuspendedfrom the coil spring and slid'ably mounted in the frame opening forvertical movement relative thereto in eitherof two opposite directions,said hanger link including'an enlarged portion disposed beneath' theopening through the frame member adapted to engage the frame memberafter 'predetermined movement of said hanger support in either of' saidopposite directions to limit the vertical movement of said hangersupport' and to provide' means for anchoring said support against saidframe member so as to provide 'a'rigid reaction joint for brakingaction, a brake beam 'hanger link pivotally connected to said. hangersupport, and vguide means between said .hanger'support and said framemember to restrictsaid hanger support to vertical movement;

3. In a brake bean; suspension for a railway car truck, a truck frameprovided with a vertically extending opening therethrough, a hangersupport movab'ly mounted in said opening including av verticallyextending bolt portion having an end disposed above said-`frame openingand va downwardly opening; YlJ-shaped, yoke portion disposed beneathsaid frame opening, a horizontally extending projection carried by theend of said bolt portion spaced above said -frame opening, a resilientmembersurrounding saidV bolt portion and disposed between the projectionon said bolt portion and the frame member, vertically slot- 9` ted,depending, frame flanges adjacent the legs of said U-shaped yokeportion, a hanger member pivotally connected to the yoke portion of saidhanger support by bolt means, said bolt means extending through thehanger member, through the slots of said frame iianges and through saidyoke portion, said bolt means thereby connecting the suspension to theframe member and providing guide means for the movement of said hangermember, said slotted flanges also providing seats to limit the movementof and to lrigidly support said hanger member when the brakes areapplied.

4. In a brake beam suspension for a railwar car truck, a, truck frameprovided with a vertically extending opening therethrough, a hangersupport movably mounted in said opening including a vertically extendingbolt portion having an end disposed above said frame opening and adownwardly opening, U-shaped, yoke portion disposed beneath said frameopening, a horizontally extending projection carried by the end of saidbolt portion spaced above said frame opening, a resilient membersurrounding said bolt portion and disposed between the projection onsaid bolt portion and the frame member, vertically slotted frame flangesdepending from said frame adjacent the legs of said U-shaped yokeportion, a hanger member pivotally connected to the yoke portion of saidhanger support by boltl means,

said bolt means extending through the hanger member, through the slotsof said frame flanges and through said yoke portion, said bolt meansthereby connecting the suspension to the frame member and providingguide means for the movement of said hanger member, and a bearingportion carried by said yoke portion adapted to engage said frame memberafter a predetermined vertical movement of said hanger support torigidly support the hanger member on the frame member when the brakesare applied.

5. A brake beam suspension adapted to be mounted on a frame membercomprising a hanger support provided with a bolt portion and a dependingyoke portion, a coil spring surrounding said bolt portion adapted toextend between the frame member and the bolt portion to resilientlymount the hanger support on the frame member for movement relativethereto in each of two opposite directions, a hanger link pivotallyconnected tothe hanger support yoke portion bolt means mounted on saidyoke portion adapted to be slidably connected to the frame member tomount the suspension on'the frame member, to limit the relative verticalmovement of said hanger support and to provide guide means for themovement of the resiliently supported hanger link.

6. A brake beam suspension adapted to be mounted on a frame membercomprising a hanger support provided with a bolt portion and a pivotportion, means carried by said bolt portion adapted to resilientlysupport said hanger support on the frame member for relative movementwith respect thereto, a hanger link pivotally connected to said pivotportion, and a seat f portion and a pin portion carried by said hangerAsupport adapted to be engaged with portions of the frame after apredetermined deformation of the resilient supporting means, to limitthe relative movement between said hanger support and said frame and torigidly support said hanger support on the frame.

7. A brake beam suspension adapted to be mounted on a frame membercomprising a hanger support provided with a bolt portion and a pivotportion, means carried by said bolt portion adapted to resilientlysupport said hanger support on the frame member for relative movement ineach of two opposite directions, a hanger link 'pivotally connected tosaid pivot portion, a seat portion carried by said hanger supportadapted to be engaged with the frame after a predetermined deformationof the resilient supporting means, said seat portion being adapted torigidly support said hanger support von the frame after predeterminedmovement of the hanger support in either of said two directions, andguide means between said hanger support and the frame to restrictmovement of the hanger support to said two opposite directions.

8. Ina brake beam suspension for a railway car truck comprising a truckframe member, a hanger support mounted in a vertically extending openingin said frame member for vertical movement relative theretoin each oftwo opposite directions, said hanger support including a yoke portiondisposed beneath said frame member opening, means disposed between saidframev member and said hanger support to resiliently mount said hangersupport on said frame member, a pin pivotally connecting a hanger linkto the yoke portion of said hanger support, vertically extending slotsinsaid frame member receiving portions of said pin to provide guidemeans for the movement of said hanger support, and means carried by saidhanger support engageable with said frame member after a predeterminedmovement of said hanger support to provide a rigid mounting for saidhanger support on said frame member after said predetermined movement ofsaid support in either of said two opposite directions.

9. A shock absorbing suspension for a railway truck brake beam that ismounted on a truck frame member rigidly connected to the truck wheelscomprising a resilient unit supported by said frame member, a brake beamhanger support mounted on the resilient unit for vertical movementrelative to said frame member in either of two opposite directions, saidhanger support including a pair of spaced apart anchor portions arrangedso as to be free of the frame member when the brakes are released butadapted to be alternately moved into direct engagement with said framemember when the brakes are applied depending on the direction of Wheelrotation, said anchor portions being arranged to limit vertical movementof said hanger support in either of said opposite directions, and abrake beam hanger member pivotally connected to the hanger support.

10. In a railway truck, a truck frame member rigidly supported on thetruck wheels, a brake beam suspension carried by said frame membercomprising a beam hanger support, resilient means supporting said hangersupport on said frame member for vertical movement relative thereto,means connecting said hanger support to said frame member providingguidev being adapted to have a portion thereof connected to a brakebeam.

11, A brake beam suspension adapted to be mounted on a Wheeled vehicleframe member comprising a brake beam hanger support, resilient meansarranged to mount said hanger support on the frame member for verticalmovement relative thereto in each of tWo opposite directions, anchormeans carried by said supportydrectly engageable with said frame memberafter a predetermined movement of said hanger support in either of saidtWo opposite directions, guide means extending betweensad frame memberand said hanger support to control and limit the movement oftheresiliently mounted hanger support, and a beam hanger link carried bysaid support.

ARCI-IIE M. MIERS.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS

